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Publication of Principia
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First Exposition of Rocket Mechanics
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Exploration of Cosmic Space
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Goddard's Rocket Patents
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First Liquid Fueled Rocket Launched
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First Artificial Satellite
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First Live Animal in Space
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First American Satellite
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NASA is Born
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First Spacecraft to Achieve Solar Orbit
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Voyager 2 Arrives at Saturn
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New Space Endurance Record
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New Space Endurance Record
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First Shuttle Docks with Mir
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Spirit Rover Lands on Mars